In this week’s geocast John and Shannon talk about geologic dikes and how they form. These features are injections of rock into pre-existing strata, classifying them as intrusive. There are two main classes: sedimentary and igneous. While igneous dikes are more common, we certainly know less about sedimentary dikes. In the field, geologists often use magnetic survey methods in an attempt to locate buried dikes. 

While in this episode we mainly focus on igneous dikes, we have an entire show on clastic or sedimentary dikes: EPISODE 177 – “GIVE IT MORE NAMES” SANDSTONE DYKES


About the Podcast

John Leeman and Shannon Dulin discuss geoscience and technology weekly for your enjoyment! Features include guests, fun paper Friday selections, product reviews, and banter about recent developments. Shannon is a field geologist who tolerates technology and John is a self-proclaimed nerd that tolerates geologists.

John Leeman
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